Guihaiothamnus

{{Short description|Genus of plants}}

{{Speciesbox

|display_parents = 3

|genus = Guihaiothamnus

|species = acaulis

|parent_authority = H.S.Lo

|authority = H.S.Lo

}}

Guihaiothamnus is a monotypic genus of flowering plants in the family Rubiaceae. The genus contains only one species, viz. Guihaiothamnus acaulis, which is only found in Rongshui County in southern China.{{cite web|url=http://apps.kew.org/wcsp/qsearch.do?plantName=Guihaiothamnus|title=Guihaiothamnus in the World Checklist of Rubiaceae|accessdate=28 April 2017}}